We collected information about Unmet Cooling Load Hours for you. Follow the liks to find out everything about Unmet Cooling Load Hours.
https://www.iesve.com/support/faq/pdf/unmet-load-hours.pdf#:~:text=1.0%20Definition%20Unmet%20load%20hours%20are%20any%20hours,system%20serving%20a%20space%20cannot%20maintain%20space%20setpoint.
https://www.iesve.com/discoveries/article/16769/unmet-load-hours-part-1
An unmet load hour is any hour of any day of the year when one or more zones in the building are outside of their temperature control range. Typically, this translates to an hour in which one or more zones is outside of the thermostat setpoints plus or …
http://www.energysoft.com/faqs/how-do-i-fix-my-unmet-load-hours/
Unmet Load Hours that are reported basically indicate how many hours the Zone will be outside of the thermostat setpoint. You cannot adjust that setpoint, Title 24 restricts the input. There are a number of causes for this message, but the net result is the zone either has too little heating, too little cooling, or inadequate airflow to maintain comfort conditions in the space, as reported by the CBECC engine.
https://www.iesve.com/support/faq/pdf/unmet-load-hours.pdf
Unmet load hours are any hours of operation when conditioned spaces are outside the throttling range for heating or cooling controls. That is, they are the hours in a year that the HVAC system serving a space cannot maintain space setpoint. If unmet load hours for multiple spaces coincide (occur in …
http://tranecds.custhelp.com/app/answers/detail/a_id/708/~/resolving-unmet-load-hours
When the HVAC System Minimum Timestep was set to the most detailed setting (1 minute), the change in unmet hours for this specific scenario was dramatic, with only 36 unmet hours occuring. Using 1 minute is extreme and may not be suitable for your situation. Using 1 minute could adversely impact the performance and calculation time of your model.
https://comnet.org/23-unmet-load-hours
Unmet load hours can occur because fans, air flows, coils, furnaces, air conditioners or other equipment is undersized. Unmet load hours can also occur due to user errors including mismatches between the thermostat setpoint schedules and HVAC operating schedules or from other input errors, for instance, high internal gains or occupant loads. The term, as used in this manual, only addresses equipment …
http://tranecds.custhelp.com/app/answers/detail/a_id/2/~/how-to-reduce-unmet-hours-in-your-trace-700-project-files.
Unmet hours can occur for a very wide variety of reasons and are restricted to hours when the excess load on a coil is at least 1% greater than the design coil capacity, and at least one room attached to that coil is in excess of +/- 1.5°F of the thermostat setpoint for that hour.
https://unmethours.com/question/28169/total-cooling-load-in-e/
A note on the "Cooling Coil Total Cooling Energy" or "Rate", since you mentioned it in your question: beware of simultaneous heating and cooling though. This will report the energy used by the coil, but if you have central heating or terminal reheat down the line, you'd effectively be providing less "actual" cooling energy. Preview: (hide) save.
https://energy-models.com/training/how-solve-unmet-hours-equest
The unmet hours can be seen in the BEPS report: “Hours any zone above the throttling range,” and you can see here that we have over 2,000 unmet heating hours, and 300 unmet cooling hours. The ASHRAE 90.1 rule is that we need to have less than 300 unmet hours …
https://www.eng-tips.com/viewthread.cfm?qid=268022
I am running simulations and the LEED report is showing that I have almost 2000 unmet load hours on the baseline building. The systems are packaged RTU and VAVs with hot water reheat. Setpoints (occupied/unoccupied) are 72/79 for cooling and 70/63 for heating.
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